| Title: |
MXene conversion to V2S3heterostructure in CS2ambient: A novel approach for sodium-ion battery anodes |
| Authors: |
Huang, Gang, Yin, Jun, Zou, Guodong, Bayhan, Zahra, Zhao, Wenli, Ming, Fangwang, Xu, Xiangming, Liang, Hanfeng, Mohammed, Omar F., Alshareef, Husam N. |
| Source: |
Materials Today Energy; December 2022, Vol. 30 Issue: 1 |
| Abstract: |
The abundant and wide distribution of sodium makes sodium-ion batteries (SIBs) one of the most promising battery technologies to supplement the current lithium-ion batteries in large-scale energy storage. However, the available anode materials are still far from satisfactory to enable the high-performance operation of SIBs. Here, a V2S3@C@V2S3heterostructure anode is developed by one-step in-situconversion of V2CTxMXene in CS2ambient. The resultant electrode has abundant heterointerfaces and controllable V2S3crystallinity and size. In this unique design, the carbon interlayer in the anode behaves like a flexible conductive support and an anchoring network. The ultrathin V2S3nanosheets and the V2S3–C heterointerfaces enhance the Na+adsorption and migration abilities, thus simultaneously mitigating the low conductivity, structural degradation, and sluggish kinetics of V2S3. As a result, this V2S3@C@V2S3anode achieves a highly reversible capacity (628 mAh/g at 0.1 A/g), excellent rate performance (477 mAh/g at 10A/g), and impressive cycling stability (2000 cycles at 20 A/g, record-high value). This performance is far better than the parent MXene phase. Considering the rich compositional diversity of MXene, the in-situconversion strategy developed here can be extended to construct a wide range of high-performance electrode materials for advanced batteries. |
| Database: |
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